Phantom Drain Advice Needed

[Lady Sprite Blue]

I drive an AWD M3 with 310 mile range. At the end of the month, I'll be traveling out of the country for a couple weeks. I leave from a friend's house three hours away from home. She doesn't have a NEMA 1450 plug although there are plenty of J1772 outlets in her town. My plan is to top up at a supercharger 30 miles away from her house so the battery will have about 90% when I leave. So, I need some advice:

1) How much phantom drain can I expect in two weeks?

2) Should I charge to 90% or just to my usual 155 miles of range?

3) I'll be able to track the status of my charge while I'm away on my iPhone which is good. Should I teach my friend about operating the M3 and ask her to charge it at some point? 

4) What other questions or considerations should I be thinking about?

[Lady Sprite Blue]

Just took a nap and woke up with an idea. Maybe I'll take the 110v plug with me and set up the M3 with it for 155 mile range limit. Thoughts?

[twistedskipper]

I cannot report from personal experience, but most indications that I've seen are that you can expect to lose 1% of charge per day while unplugged, which in a Model 3 LR AWD should mean about 3 miles a day, so you should be good. 14 days shouldn't lose you more than about 45 miles or so.

If you start at 279 miles range (90%), then you'd have to lose more than 16 miles of range (5%) per day to get down to 50 miles range by the time you return in two weeks, so if there's a Supercharger 30 miles away, then even that very bad case would leave you plenty of range to get there.

[Lady Sprite Blue]

31 minutes ago, twistedskipper said:

I cannot report from personal experience, but most indications that I've seen are that you can expect to lose 1% of charge per day while unplugged, which in a Model 3 LR AWD should mean about 3 miles a day, so you should be good. 14 days shouldn't lose you more than about 45 miles or so.

If you start at 279 miles range (90%), then you'd have to lose more than 16 miles of range (5%) per day to get down to 50 miles range by the time you return in two weeks, so if there's a Supercharger 30 miles away, then even that very bad case would leave you plenty of range to get there.

Hey, thanks. Reassuring. I’m going to try the 110V plug and just let her sit tight. Read about a guy who left his 3 in a garage in Maine over the winter. It was on the charger the whole time. When he broke it out in the spring, he just got I;and rove away. 110V May be slow, but fir two weeks away to keep the car at 50% should work. Thanks again. 

[Clive Flint]

Have you checked Bjorn's latest video about leaving his Model 3 at the airport for three weeks?

https://youtu.be/EFQQFS3XEKM

It shouldn't be a problem leaving it for a while.